Investigating the Role of Energy Balance Modification on Health Responses in Chronic Lymphocytic Leukaemia

This study explores how changes in diet and exercise (energy balance) affect the health of people with chronic lymphocytic leukemia (CLL), a slow-growing blood cancer. Participants will do supervised physical activity and researchers will measure how it affects their body and disease. **You may be eligible if...** - You are 18 or older with a confirmed diagnosis of CLL - You are physically able to walk on a treadmill or ride a stationary bike - You pass a standard physical activity readiness questionnaire **You may NOT be eligible if...** - You recently started corticosteroid treatment (within 7 days), unless on a low dose - You have had another active cancer in the past 3 years (some exceptions apply) - You are physically unable to do the required exercise tests Talk to your doctor to see if this trial is right for you.